Eraser_stp said: No one asks is he interested or not. Tsundere girls always get what they want.
Nah, you're just wondering too much cliches, this pic is just a fan draw which expresses the artist feelings. In the other hand the series was a OneShot which only included the first arc and Touma ended with Index. I won't be surprised if Touma is just developing his feelings towards her as he did since the vol.17.
I ship nothing, but I think ToumaxIndex makes the most sense, because Index kind of needs him, whereas Mikoto, albeit occasionally immature and highly emotional, can take care of herself.